ISO 2598-1:1992

Overview

ISO 2598-1:1992 is an international standard published by the International Organization for Standardization (ISO) that specifies gravimetric methods for the determination of silicon content in iron ores. The standard covers procedures for the analysis of silicon content ranging from 1% to 15% in natural iron ores, iron ore concentrates, and agglomerates, including sinter products. By providing reliable, repeatable methodologies, ISO 2598-1:1992 underpins quality control in iron ore processing, enhances laboratory confidence, and aligns international practices for chemical analysis in the mining and metallurgical industries.

Key Topics

• Silicon Content Analysis: Focuses on determining silicon concentration in iron ores via gravimetric methods.
• Two Analytical Methods:
  • Method 1 (Alkali Sinter Attack): Involves sintering the test sample with sodium peroxide, followed by treatment with hydrochloric and perchloric acids. Recommended for lower grade ores with high contents of amphoteric elements.
  • Method 2 (Acid Attack): Utilizes direct treatment of the sample with hydrochloric, nitric, and perchloric acids. Suitable for high-grade ores with minimal gangue and those with fluorine content greater than 0.1%.
• Sample Preparation: Specifies particle size and drying procedures and references related ISO standards for accurate sampling and sample handling.
• Precision and Repeatability: Establishes guidelines and equations for ensuring acceptable repeatability and laboratories' compliance during silicon determination.
• Reporting Requirements: Outlines the necessary details for test reports, enabling traceability and validation of results.

Applications

Organizations and laboratories involved in iron ore mining, beneficiation, and trading utilize ISO 2598-1:1992 to:

• Quality Control: Ensure iron ore products meet contractual and regulatory requirements by verifying silicon content.
• Process Optimization: Monitor silicon concentrations to optimize ore processing and smelting operations, as excessive silicon can impact steelmaking.
• International Trade: Provide standardized, comparable silicon content results for global transactions between suppliers and customers.
• Accreditation and Compliance: Labs accredited for iron ore analysis follow ISO 2598-1:1992 to demonstrate methodological rigour.
• Research and Development: Support geological studies and the development of new processing methods through reliable silicon analysis.

Related Standards

• ISO 2598-2: Iron ores - Determination of silicon content - Part 2: Reduced molybdosilicate spectrophotometric method (preferred for ores with silicon content below 5%).
• ISO 3081: Iron ores - Increment sampling - Manual method.
• ISO 3082: Iron ores - Increment sampling and sample preparation - Mechanical method.
• ISO 2596: Iron ores - Determination of hygroscopic moisture in analytical samples.
• ISO 7764: Iron ores - Preparation of predried test samples for chemical analysis.
• ISO 648 and ISO 1042: Laboratory glassware standards for pipettes and volumetric flasks, respectively.

Firms engaged in iron ore chemical analysis should apply ISO 2598-1:1992 alongside these related standards for comprehensive laboratory and quality assurance processes.

By implementing the procedures outlined in ISO 2598-1:1992, industries gain reliable, internationally recognized methods for the gravimetric determination of silicon content in iron ores, supporting operational efficiency, product quality, and regulatory compliance.